________________is the pathogen which is responsible for Ascariasis.

The correct option is B

Ascaris lumbricoides

The correct option is B.

Explanation of the correct option:

1. Organism belonging to bacteria, viruses, protozoa, helminths, etc. that causes disease in humans is known as Pathogen.
2. The causative helminth for Ascariasis is a roundworm, Ascaris lumbricoides.
3. Symptoms of Ascariasis are Abdominal discomfort, Loss of appetite, vomiting, and diarrhea.
4. Transmission of Ascariasis is through unwashed raw vegetables and Lack of personal hygiene.
5. Ascariasis can be treated by the use of drugs, such as albendazole, and mebendazole.

Explanation of the incorrect options:

Option A:

• Taenia solium commonly called tapeworm causes Taeniasis.

Option C:

• Wuchereria bancrofti causes Filariasis, commonly called elephantiasis.

Option D:

• Mycobacterium is a bacterium that causes Tuberculosis.

Ascaris lumbricoides is the pathogen that is responsible for Ascariasis.